Capacitor consists of two metal electrodes sandwiched between a layer of insulation dielectric.
When coupled with the voltage between the two metal electrodes, electrodes will be storage charge, so the capacitor
energy storage element.
Any two within easy reach of insulation and conductors, each other to form a capacitor.
Parallel plate capacitor is composed of capacitor plate and dielectric.
Capacitor characteristics: 1.
It can charge and discharge characteristics and blocking dc circulation, allowing ac current through.
In the process of charging and discharging, the charge on the plates have accumulation process, i. e. voltage are establishing process, therefore, the capacitor on the voltage mutation.
Capacitor charging: two plate with equal unlike charge respectively, the absolute value of each plate with power capacitor charge.
Polar capacitor discharge: capacitor through positive and negative charge on the conductor is neutral.
There was a short current generated in the discharge process sprocket online.
3 capacitance charging process.
The capacitive reactance of capacitor is inversely proportional to the frequency, capacity between.
Namely analysis capacitive reactance size will have to contact the signal frequency, and the size of the capacity, how to judge whether a capacitor in series 1, up from the characteristics of the capacitor connection mode decision: two capacitors only a highly interconnected, and another is highly interconnected.
2, from the polarity of the capacitor plate charged to determine: different polar plate capacitor is connected together.
Capacitor in series features 1, each capacitor with equal charge: q1 q2 = = q3 = q2, the series capacitor group the total voltage is equal to the sum of the voltage on the capacitor: U = U1 + U2 + U33, and the reciprocal of the total electric capacity of capacitor set equal to the sum of the reciprocal of the capacitance of each capacitor (
The smaller the string)
: formula of capacitor in series capacitor in series is to increase the thickness of the dielectric, or increase the distance between the two plate capacitor (
See the figure)
The capacitance decrease consequently.
After a series of capacitance with the following formula:
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